CVE-2026-80757 - selinux: reject a class permission count below its inherited common

CVE-2026-80757 - selinux: reject a class permission count below its inherited common

https://cvefeed.io/rssfeed/latest.atom / Thu, 09/03/2026 - 13:29
CVE ID :CVE-2026-80757
Published : Sept. 3, 2026, 8:26 a.m. | 2 hours, 37 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.
Severity: 0.0 | NA
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